Texas v. New Mexico and Colorado

Opinion summary

Etalia.ai summary of the majority opinion

The case involved a dispute between Texas, New Mexico, and Colorado over water rights related to the Rio Grande Compact. The states had previously agreed on allocations of the river's waters under this compact. However, Texas claimed that New Mexico was violating the agreement by allowing excessive groundwater pumping and diversions upstream from where it enters Texas, thus reducing its share of water as stipulated in the compact. Colorado was included due to its role in managing part of the river system covered by the agreement. The Supreme Court ruled in favor of enforcing stricter adherence to interstate compacts like these when disputes arise about resource allocation among states. This decision underscored federal authority over such agreements while emphasizing equitable apportionment principles.